Type-writing machine.



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APPLICATION FILED DEO. 16, 1905.

IE7/67a Zw; flomldon.

ztz'orrzerys residing at 6 Boundary Road, Hampstead,.in

. 'narran isrA'rjns PATENT orrionN sinner HERBERT noiriliisbN, or HAMPSTEAD, ENGLAND.

i TYPE-wemelt; MAci-HNE.

Specification of Letters Patent.

Applimionha December 16.1905. seriairazeaosz.

To all whontit'may concern: Y

Be itknownfth'at I, Sinner HERBERT DON- ALDsoN, a subject of the King oi England,

the county of. London, ',En'glami,l have invented lcertain",new and` 'useful Improvements in T eWritin Machines; andfI' do hereby dec are "the fo lowing to be V,a full, clear, and exact description of the invention, such as willenable others skilled inthe art to l whichy it'appertain's lto make and use the in order to ard makes of t same.- This taining marginal adjustments von type-writrakattached by means of a clip,

invention relates to a method of' obng machines, and refers particularly to the class of indicators in which the 'rotation of the platen-roller is arrested after -a given number of revolutions, partial'or comple-te, y regulate the vertical height or position upon the paper of the'rst, last, or any other line of type-writing.

-The usual 'form of my invention consists of a box or case of-metal or other suitable mateclamp, screw, or4 the like to the frame of the papercarriage and may be adapted to most standpe-writers. The case contains vgearing W 'i wheel -ied iri'ctionally or otherwise upon the Y 3ro j *by preference, -upper portion,

shaft ofthe .platen-roller. The boXor case is, of a'semicircular form at the and consists of metal plates and or rimof metal.

joined together by a b spindlep'asses through the center of bothside plates and has a Xed pointer upon the rront end and a milled head or knob at the back end. On, the inside of the boXor case is iixed a gear-wheel, so placed in the case as to engage, while the spindle is in its normallposition, with al pinion, whichA forms' part of a train otlv a diminishing gear, which, as before mentioned, is actuated by means of the wheel .upon the shaft of the platen-roller.

The gearing is designed so as to give. two,

three, or more revolutionsv of the paper-- partial revoluj tion of the fixed pointer uponthe spindle before n nentioned.A l f --It will be seen that when the platen-roller is revolved in feeding the paper the fixed pointer covers a given area and makes a partial revolution uponthe faceo'f the case in proper proportion to the rate'of rotation and the posities he pressure upon the knob, loosely attached dleand admitof a'fmechanism consisting of 'ch is actuated by a gearoi. the said paper-roller until the pointer is stepped, as hereinafter explained.h

to theback of the spindle, moves the wheel, v'which is fixed thereon, `out of gear with the rest ofpthe -trainof Wheels and pinions. A spring is. attached, one end to the spindle, the other end to the case', so as'to bring the spinthe hand back, to zero, when it is forced out o'eng'agement with the rest of the train, as before mentioned.` The band or rim which joins the two plates together and forms thecase is slotted in p y a lbox which slides in thesl'ot ,and can be clamped at any convenient -position on the outerl and upperpart of the rim of the said case and having. the necessary clamping-screw for the' purose of retaining it in the required position. he box also contains a small slidingrod having a-hand o r stop I rests normally uponthe faceoi` the case in -such a position as to arrest the passage of the pointer, and-so sto the laten-roller in anyI 'desiredposition hero ,withthe hand, has a lon itudinal motion in the b'oX and is retaine by means oa spring, close home to the face of the plate.

In order that my said invention may be betterunderstood, I'will now proceed to describe the same With reference' tothe drawings accompanyingy specification', in which- Figure' 1 isa'side elevation ofthe attachment. Fig. 2l is a front elevation. Fig. l3 is Fig.-4 is a similar, vieWtoFig. ,1, with the clamp and front plate removed. Fig. y5 is a front plate removed. Fig; 6 is view of front plate removed to show the sliding piece hereinatter referredto. Fig. 7 is side elevation such a way` as to Patented Feb; 12, 1,907.

xed thereto, which hand ,A an elevation .of the opposite side to- Fig. 1n t `similar view to Fig. 3, with fthe clamp and of Fig. 6. Figs..8 to 14 show-details hereinafter referredv to.

The same'letters of reference are employed to denote the sameparts in all the views.

Referring to Figs. 1 to 'fthe box forming mydevice consists of-amback plate e and a detachable .plate `b, (shown separately at tached by screwsav (S'hown dottedat Fi 1.) d is a suitably-,shared shoe','into whic means of thev screws'e. T vided yvithaclam ,which b arlat the end of t e carriage, to wblch it is Figs. 6 and 7,) which ,fits thereon and is atattached by' means of-the'screws It will o course be understood thatjthis c amp may be varie'daccording to the type of machine to ianthe groove z t which the device is to be attached. In the -drawings the device is shown of a shape suitable for attachment to the Yost typeWriting j'machine. 5 h' is a spindle,which passes through the plates a and b and is provided at one end with a fixed pointer y' and at the other end with a milled head or knob 7c. The spindle h carries a gear-wheel m. 'nis a spring, one end of which is attached to 'a pin p, the other end being attached to the spindle h. Q is a fiat spring. (Shown in detail at Figs. 8 and 9.) i This'spring g is put over the spindle 71 and when the plates a and 'b are screwed together, r 5 Ythe two ends bearing against `the plate a, thespring tends to keep the pointer j on the surface of the platea. ris a pinion, with which the Wheel m is in engagement when the pointer is on the surface of the plate a. To the-same. shafty as the pinion 1 is attached a gear-wheel s, which lengages with a gearwheel t on the s indie of the platen-roller. (u. is a dovetail side, sliding inthe plate b, provided with a keyhole-slot fu, taking around the'spindle h. The said spindle h has a circumferential groove w cut` around it. (This is shown dotted .at Fig. 6..) The ur spose-ofthis roove and sliding late is to ook the spindle in the position with the pointer j away from the late a and when the geary'wheel m is put o engagement, with the pin#A ion r by slidin the said plate along. z isa slot cut aroun the ed e of the box forming the device, and in this s ot z slides thedevice. (Shown in detail at Figs. 10 to 14.) This device comprises a box 1, as shown in section at Fig. 14. This box 1 contains a small sliding-rod 2, carrying at one end a head or stop v 3, the other end being enlargedto slide inthe 4b boX`1and provided with a milled head 4. 5 is a spring between the enlarged portion of .the rod.2 and astop 6 inside the box `1 for keeping the stop 3 normally on the surface of the plate a. 7 is a milled head rovidedwith a screw 8, which passes throng a. late 9, to which the' spring-box y1 is attac ed. The screw when -1n position passes through the slot z and screws into the small,l plate 10, which is so sha ed as-to slide on the inside of hat the' box 1 may be drawn round into any lposition in the slot z andA clamped in position. l The action of the device is as fellows: When it -isdesired to obtain a vertical adjustment and regulate the position of a certain line u on the paper, the box 1 is drawn -round an :clamped in its pro er yposition upon the outerrim of the case. f necessary,

A graduationsmay be provided around the 66 .edge of theplate a to indicate the required position for any' particular class of typewriting1 machine'- As the platen-roller rotates t e'pointer 'v is rotated by means of -the gear-wheels, unti it comes int'o contact with I the stop '3, when the motionof fthe-platenroller is arrested. To enable the action tofbe continued, 'all that is necessary is to push the milled head 4, thus pushing out the stop 3, When the stopis raised sufficiently to release the pointer j, and .coming down again rests upon the top of the said pointer y', when spring n. When it isI desired to keepthe.

mechanism out of action entirely for a time, it is simply necessary to push in the head llc and slide the plate u along, as previously described. Whenthe slide u is again pulled out, the Wheel m comes into engagement,

owing to the action of the flat spring g. When desired, more than one of the springboXes 1 may be employed, should it be re-v quired to stop the rotation of theplaten,

roller at more'than one predetermined point.

What I claim, and desire to secure by Letters Patent of the United States of America, is;

1. In a device of the character described,

the' combination with the platenroller, of a frame removably mounted adjacent said roller, an adjustable stop mounted in said frame, a transverse shaft, a gear-trvain driving said shaft yfrom said platen-roller, av

pointer carried by said shaftand ad'apted'to engage with said stop to prevent further rotation of said platen-roller, means for temporarily displacing said stop to allow said pointer to pass, and means for permanently' displacing said transverse shaft to move said gear-tranent of operation, substantially as` described. l

2. In a device of the character described, the combination with the platen-roller, of a frame removably mounted adjacent said roller and comprising a base member and two side members fastened within said base member, an adjustable stop mounted between said side members, a downwardly-prdjecting arm extending from said stop, a sp1-ing normally holding said arm against one of said side members, a transverse shaft mounted in said side members, a gear-train driving said shaft from said platen-roller, apointer carried by said shaft and adapted to engage with said arm on said stop to revent further ro Y tation of said'pla-ten-rol er, and :means for displacing said transverse shaft to disconnect said gear-train, substantially as described. 3. In a device of hthecharacter described,

the combination Withthe platen-roller, of a frame removably mounted adjacent said roller and comprising a base member and two side members fastened Within said base members, an 'adjustable stop mounted between said side members,a downwardlyprc ITO 'side member, means of said side members, a transverse shaft mounted in said side members,v a gear-train released,- substantially driving said shaft from said platen-roller, a pointer carried bysaid shaft anddadapted to engage with said arm on said sto to prevent further rotation of said platen-ro ler, a spring normally holding said pointer. against .sai

for permanently displacing said transverse shaft to disconnect said gear-train until said shaft is released, andv means for automatically moving sai shatto again connect said gear-train when as described.

ln testimony whereof l aliX my signature' in presence of tWo Witnesses.-

p SIDNEY. IIENB'NNTv DONALDSON.

Witnesses r D; JAMESON,4 A. NUr'rING. 

